oh my..................you spanish.................is sooooo good..............i imagine that you are using some kind of tool to write but, as far as you are aware of what you are writing and how it relates to english, you will learn a lot.................also try to read simple texts and watch series with short episodes and always use subtitles in english............getting to know as much vocabulary as possible is so important when learning a foreign language and, the more you know, the faster you will learn.................
besides..............produce.........speak.............write..............it is my pleasure to read you in spanish and, of course, i will send you some comments of what you write when i spot any kind of mistake...............

Cuando puse las flores en un jarrón, (you do not use a comma here..........it has to do with the fact that this is a adjectival defining sentence instead of a non-defining..............too long to be explained here but you can google it as the exact same difference exists in english)
que g/ me había regalado para mi cumpleaños,
él (subjects are normally not written in spanish, above all when they are pronouns and the noun they point back to an element which is really close........this elemente would be g/ in the previous sentence) no estaba contento con su estado.

Así que, al día siguiente,
volvió a la floristería
(lleva años comprándolas en el mismo sitio)
y le dieron estas también.

the second paragraph is just perfect.................